The Sport Ridge AR15 End Plate QD sling mount is designed for any standard Mil-Spec AR15 lower receiver. Solid Steel Construction with a matte black finish. Unique contouring design allows operation of most collapsible stocks in all positions, including being fully collapsed. QD sling swivel housing designed with anti-swivel rotation stops to remove any sling twisting while in use. Description: Fits Milspec AR15's Anti-Rotation Stops Steel Construction